Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 114,781	$ 77,253
Accounts receivable, net of allowance for doubtful accounts of $58 and $122 at December 31, 2011 and 2010, respectively	34,433	32,050
Inventories	18,637	15,720
Prepaid expenses	2,793	2,328
Prepaid income taxes	4,142	1,199
Deferred income taxes	556	552
Other current assets	398	550
Total current assets	175,740	129,652
Property, plant and equipment, net	44,282	43,388
Goodwill	28,515	28,515
Intangible assets with finite lives, net	22,706	26,649
Other assets	474	420
Total assets	271,717	228,624
Current liabilities:
Trade accounts payable	11,526	9,755
Accrued expenses	8,395	9,250
Accrued compensation and other benefits	4,328	4,710
Customer deposits and other deferred revenue	40	0
Dividends payable	5,237	4,311
Current portion of long-term debt	1,387	1,482
Total current liabilities	30,913	29,508
Long-term debt	23	3,432
Deferred income taxes	5,984	5,642
Other long-term obligations	2,788	2,575
Total liabilities	39,708	41,157
Stockholders' equity:
Preferred stock, $25 par value. Authorized 2,000,000 shares; none issued and outstanding	0	0
Common stock, $.0667 par value. Authorized 60,000,000 shares; 29,165,721 shares issued and outstanding at December 31, 2011 and 28,752,325 shares issued and outstanding at December 31, 2010	1,944	1,917
Additional paid-in capital	49,933	38,557
Retained earnings	181,070	147,542
Accumulated other comprehensive loss	(938)	(549)
Total stockholders' equity	232,009	187,467
Total liabilities and stockholders' equity	$ 271,717	$ 228,624